420 Silurian and Devonian Fossils of Canada. 



variable distances; intervals between the tubes occupied bv a 

 cellular network of small vesicular plates, or capillary tubules 

 traversed by diaphragms." 



This genus has no radiating lamellse, a character which con- 

 stitutes the only difference between it and Heliolites (Dana.) 



1. Fistulipora Canadensis (Billings). 



Description. — Corallum forming irregular, contorted masses, or 

 wide, flat, undulating expansions or layers from one-half of an 

 inch to one inch in thickness, which are based upon a thin, con- 

 centrically wrinkled epitheca. Cell-tubes half a line or less in 

 diameter, and about one line distant from each other ; the mouths 

 of the tubes protruding a little above the general surface. Trans- 

 verse diaphragms thin, horizontal or flexuous, and sometimes very 

 numerous, there being in some of the tubes three or four in half a 

 line of the length of the tube. The intercellular tubules are poly- 

 gonal, and about four in the diameter of one of the principal 

 cells ; their transverse diaphragms are well developed, usually 

 four or five to one line of the length. 



F. Canadensis differs from the other described species in the 

 following respects : — From F. decipiens (McCoy) in having the 

 cell-tubes more distant and the diaphragms more numerous, and 

 from F. minor (McCoy) in the same particulars, the cell-tubes of 

 the latter species being still smaller and closer together than in 

 F. decipiens. 



This coral much resembles Heliolites porosa (Goldfuss), but 

 can be readily distinguished by the absence of the radiating septa- 



Locality and Formation. — Devonian; Corniferous or Onondaga 

 limestone ; lot 6, con. 1, Township of TTainfleet ; at the east end 

 of Lake Erie. 



Collector. — A. Murray. 



Genus Colciixaria (Goldfuss). 



Generic characters. — Composed of large masses of elongated 

 sub-parallel corallites, which when separate are round, but when 

 in contact polygonal. Radiating septa either rudimentary, or well 

 developed, sometimes reaching the centre. Transverse diaphra- 

 gms numerous, usually complete, and either horizontal, oblique or 

 flexuous. 



Columxaria Goldfussi (Billings). 



Description. — This species is found in large amorphous or sub- 

 globose masses composed of long straight or flexuous polygonal 



